Chen, Zhidu, Shoufu Yu, and Shaofen Guo. “Effect of Sm3+ on the Spectroscopic Properties of Poly(N-Vinylisobutyramide)”. Asian Journal of Chemistry 26, no. 7 (March 31, 2014): 1965–1968. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_8_18.